Chem 103 exam 1 review exam latest 2026 aCtUal QUestions
and verified answers (latest UPdate) a+ Grade
100% GUarantee verified By exPerts
What is an acid? - answer-solution has an excess of H+ ions
What is a base? - answer-solution has an excess of hydroxyl ions (OH-)
What is neutralization? - answer--process where acid and base are mixed until they
become neutral and the PH is 7.
What are the two products of a neutralization chemical reaction? - answer-water and
salt ( The type of salt depends on acid or base added to neutralize.)
What is a weak acid? - answer-an acid that only partially ionizes in an aqueous
solution. This means that not every molecule breaks apart.
pH - answer-is a measurement of how acidic or how basic a solution is.
Why is pH important to biology? - answer-Cells survive in a specific pH range.
Human blood is maintain at 7pH for homostasis.
The stomach has acids to break down food.
Bile from the liver is a base which breaks down fats & grease.
What is a buffer? - answer-a substance to help to neutralize/balance pH levels.
What are pH indicators? - answer-They are used to tell you the pH value.
,Examples are phenalphelein and bromthymol blue.
What are the properties of an acid? - answer-taste sour, conduct electricity, corrosive,
reacts with metals, turns litmus paper red.
Give examples of acids - answer-HCL which is in your stomack.
Sulfuric acid which is used a lot in industries to make fertilzers, paints, etc.
Tums antacid used to neutralize stomach acids.
What are some uses of bases? - answer-soaps and cleaning products
used in batteries
What are some examples of bases? - answer-lye used to make soap.
Liquid plummer used for clogged drains. Baking Soda and Baking powder
What is the main neutral substance? - answer-water
How is a salt chemically formed? - answer-When you add acid or base to neutralize a
solution the products formed are water and salts.
A change in pH units represents a tenfold change in the acidity of the solution
(logarithmic scale). If one solution has a pH of 1 and a second solution has a pH of 2, the
first solution is not twice as acidic a the second it is ______times more acidic. -
answer-ten (logarithmic)
What is a pH scale? - answer-a logarithmic scale that indicates the pH of a solution. It
ranges from 0 - 14.
On the pH scale, what numbers represent an acid? - answer-0-6
,On the pH scale, what numbers represent a base? - answer-8-14
On the pH scale, what number represents a neutral solution? - answer-7
What is a weak acid? - answer-An acid that only partially ionizes (breaks down) in a
solution. Weak acids are close to 7pH
What is a weak base? - answer-A weak base will only parttally ionize in a solution. This
means that not every molecule breaks apart.
What is a chemical change? - answer-When a change in composition occurs giving
new substances with new properties.
Example when wood changes to carbon. Wood and carbon do not have similar
properties.
WHat is a physical change? - answer-When a change does NOT change the
composition.
What are indicators of a chemical change? - answer-Observations such as what you
see( color change, precipitant (solids in solutions)
Hear-boom Smell Taste-sour/sweet Feel-hot or cold.
Also, bubbles indicate gas..
What is the law of conservation of mass? - answer-Mass is not created nor destroyed.
What is a chemical formula? - answer--chemical symbols represent molecules with
subscripts to represent the number of that element.
NaCl represents table salt.
Reactants are on the right or left of the -> (yield) sign in a chemical equation. - answer-
left
, Products are on the left or right of the ->(yield) sign in a chemical equation. - answer-
right
What does the -> represent in a chemical equation? - answer-yield or to produce
What is a chemical equation? - answer-It represents with chemical formulas a chemical
change/reaction.
When one molecule splits apart and switch places this is called a __ reaction. - answer-
replacement type of chemical reaction
What is a reactant in a chemical equation? - answer-They are substances that are
present before the chemical change takes place. They are what you put into the chemical
reaction to cause a chemical change.
What is a product in a chemical equation? - answer-Chemicals that are formed during
the chemical change.
When energy is absorbed in a chemical reaction it is a __reaction. - answer-
endothermic
When energy is released in a cheicial reaction it is a __reaction> - answer-exothermic (
usually in the form of heat)
What does a neutralization chemical reaction produce? - answer-water and salt
A chemical reaction is when a __ change has occurred. - answer-chemical
What happens to the old molecules in a chemical reaction? - answer-They rearrange
into new molecules
and verified answers (latest UPdate) a+ Grade
100% GUarantee verified By exPerts
What is an acid? - answer-solution has an excess of H+ ions
What is a base? - answer-solution has an excess of hydroxyl ions (OH-)
What is neutralization? - answer--process where acid and base are mixed until they
become neutral and the PH is 7.
What are the two products of a neutralization chemical reaction? - answer-water and
salt ( The type of salt depends on acid or base added to neutralize.)
What is a weak acid? - answer-an acid that only partially ionizes in an aqueous
solution. This means that not every molecule breaks apart.
pH - answer-is a measurement of how acidic or how basic a solution is.
Why is pH important to biology? - answer-Cells survive in a specific pH range.
Human blood is maintain at 7pH for homostasis.
The stomach has acids to break down food.
Bile from the liver is a base which breaks down fats & grease.
What is a buffer? - answer-a substance to help to neutralize/balance pH levels.
What are pH indicators? - answer-They are used to tell you the pH value.
,Examples are phenalphelein and bromthymol blue.
What are the properties of an acid? - answer-taste sour, conduct electricity, corrosive,
reacts with metals, turns litmus paper red.
Give examples of acids - answer-HCL which is in your stomack.
Sulfuric acid which is used a lot in industries to make fertilzers, paints, etc.
Tums antacid used to neutralize stomach acids.
What are some uses of bases? - answer-soaps and cleaning products
used in batteries
What are some examples of bases? - answer-lye used to make soap.
Liquid plummer used for clogged drains. Baking Soda and Baking powder
What is the main neutral substance? - answer-water
How is a salt chemically formed? - answer-When you add acid or base to neutralize a
solution the products formed are water and salts.
A change in pH units represents a tenfold change in the acidity of the solution
(logarithmic scale). If one solution has a pH of 1 and a second solution has a pH of 2, the
first solution is not twice as acidic a the second it is ______times more acidic. -
answer-ten (logarithmic)
What is a pH scale? - answer-a logarithmic scale that indicates the pH of a solution. It
ranges from 0 - 14.
On the pH scale, what numbers represent an acid? - answer-0-6
,On the pH scale, what numbers represent a base? - answer-8-14
On the pH scale, what number represents a neutral solution? - answer-7
What is a weak acid? - answer-An acid that only partially ionizes (breaks down) in a
solution. Weak acids are close to 7pH
What is a weak base? - answer-A weak base will only parttally ionize in a solution. This
means that not every molecule breaks apart.
What is a chemical change? - answer-When a change in composition occurs giving
new substances with new properties.
Example when wood changes to carbon. Wood and carbon do not have similar
properties.
WHat is a physical change? - answer-When a change does NOT change the
composition.
What are indicators of a chemical change? - answer-Observations such as what you
see( color change, precipitant (solids in solutions)
Hear-boom Smell Taste-sour/sweet Feel-hot or cold.
Also, bubbles indicate gas..
What is the law of conservation of mass? - answer-Mass is not created nor destroyed.
What is a chemical formula? - answer--chemical symbols represent molecules with
subscripts to represent the number of that element.
NaCl represents table salt.
Reactants are on the right or left of the -> (yield) sign in a chemical equation. - answer-
left
, Products are on the left or right of the ->(yield) sign in a chemical equation. - answer-
right
What does the -> represent in a chemical equation? - answer-yield or to produce
What is a chemical equation? - answer-It represents with chemical formulas a chemical
change/reaction.
When one molecule splits apart and switch places this is called a __ reaction. - answer-
replacement type of chemical reaction
What is a reactant in a chemical equation? - answer-They are substances that are
present before the chemical change takes place. They are what you put into the chemical
reaction to cause a chemical change.
What is a product in a chemical equation? - answer-Chemicals that are formed during
the chemical change.
When energy is absorbed in a chemical reaction it is a __reaction. - answer-
endothermic
When energy is released in a cheicial reaction it is a __reaction> - answer-exothermic (
usually in the form of heat)
What does a neutralization chemical reaction produce? - answer-water and salt
A chemical reaction is when a __ change has occurred. - answer-chemical
What happens to the old molecules in a chemical reaction? - answer-They rearrange
into new molecules
